^{Photo Credit: World Wildlife Fund}

The Central Highlands of Mexico are home to one of the world's most astounding annual wildlife events.

Every year, millions of monarch butterflies embark on an epic journey spanning thousands of miles from the United States and Canada to reach the oyamel fir forests of Mexico.

Once here, the butterflies cluster on tree trunks and branches and stay in the area for the winter.

Upon arrival, the butterflies form dense clusters on the trunks and branches of trees and stay in the area for the winter.

If you want to see this awe-inspiring phenomenon firsthand, the best time is between late January and the end of March. During this period, the air temperature warms, coaxing the butterflies into a mesmerizing display of fluttering wings.

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